Skip the auto shop - Our mechanics make house calls

Q: Surges of power on downhill

asked by on

Sometimes when I drive downhill, my 2009 Toyota Corolla surges forward slightly, making braking more difficult. It seems like this could be a serious problem in the wrong circumstances. What causes this to happen? Is there a technique to braking on downhills that could prevent it? Car has under 100,000 miles on it.

A: The issue you are having sound like either ...

The issue you are having sound like either the throttle is not returning to a closed position or your transmission went into overdrive lock up when you let off of the accelerator pedal. Contact YourMechanic to go through a thorough diagnostic check of your vehicle to determine the causes. This vehicle may be covered by one or more campaigns or recalls for engine acceleration issues. YourMechanic can check for any recalls for you when they comes to check your car for you. YourMechanic will call a Toyota dealer or Toyota directly for you to see if there are any recalls on your vehicle. Have any recalls or Technical Service Bulletins (TSB) done along with any additional diagnostics or repairs recommended by YourMechanic. If after all available recalls are completed, the problem still exist, then YourMechanic can diagnose and repair it for you.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Save up to 30%

Get a quote

What others are asking

Q: Engine temperature goes up when I run air

I have seen this issue before. When you turn on your air conditioning, there is a part called a condensor that sits in front of the radiator that gets very hot. The condensor looks similar to the radiator and actually...

Q: How do I use the radio presets?

The radio presets allow you to set favorite radio stations, so that they are easily accessible with the touch of a button. You can set up to six presets for each radio mode (AM, FM1, and FM2). Here’s how to...

Q: What does it mean when the interior alarm sounds continuously?

The interior alarm can sound in a variety of ways to alert you when something is not correct. The alarm will sound continuously if you attempt to open a door and exit the vehicle when the shift lever is in...

Related articles

P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the P0052 code means This code is seen when the Engine Control Module (ECM) tries to control the...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.